ERBB2 and neoplasm: EPHA2, E-cadherin, HER2, and EGFR expression in retained tumor tissues; and EPHA2, CD16, NKp46/NCRI, CD3, CD68, PD-L1, E-cadherin, EGFR, and HER2 expression in paired biopsies obtained before Cycle 1 and 2 also demonstrated no apparent relationship between these expression levels or changes in expression levels and tumor responses.